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In a raw Itanium, a 'Processor Abstraction Layer' (PAL) is incorporated in system. When it's booted PAL is loaded in the CPU and provides a low-level interface which abstracts a number of instructions in addition provides a mechanism for processor updates distributed by a BIOS update.
At the time of BIOS initialization an additional layer of code 'System Abstraction Layer' (SAL) is loaded which provides a uniform API for implementation specific platform functions.
On top of PAL/SAL interface sits 'Extensible Firmware Interface' (EFI). EFI isn't part of IA-64 architecture however by convention it's needed on all IA-64 systems. It is a simple API for access to logical features of system (display, storage, keyboard etc) combined with a lightweight runtime environment (which is similar to DOS) which allows basic system administration tasks like configuring storage adapters, flashing BIOS and running an OS boot-loader.
Moment OS has been booted; some features of PAL/SAL/EFI stack stay resident in memory and can be accessed by OS to perform low-level tasks which are implementation-dependent on underlying hardware.
Define the method of Implementation Once "final" system has been designed it is then essential to put together the software and hardware and introduce the new system. There ar
1. How can you divide the screen into quadrants? Is the process called as ‘viewing transformations’?
Disadvantages of macro processor
Uniform Memory Access Model (UMA) In this model, the main memory is uniformly shared by all processors in multiprocessor systems and each processor has equal access time to sha
For F = A.B.C + B.C.D ‾ + A‾.B.C , write the truth table and simplify using Karnaugh map . And. Simplification of Logic Function F = A B C + B C‾ D + A‾ B C. Therefore the
3-variable K-maps have 8 squares which arenormally arranged in 4 columns and 2 rows.Columns are labeled with 2 variables. The columns are arranged so that either A or B cha
What is ROM? Ans: ROM: It is called Read Only Memory, is a Permanent or Semi-permanent Memory. The data is permanently stored and cannot be changed, in Permanent ROM. Th
explain common bus system with the help of neat diagram in basic computer.
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Q. What is Pure semiconductors? Pure semiconductors, known as intrinsic semiconductors, have very few charge carriers and may hence be classified as almost insulators or very p
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